*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

nav{
    width: 100%;
    height: 35px;
    background-color: #3097d1;
    border-bottom: 1px solid #0f79b5;
    margin-bottom: 20px;
}
.container{
    width: 854px;
    height: 35px;
    margin: auto;

}

.nav-center img{
    width: 60px;
    height: 20px;
    margin-top: 8px;
    float: left;
}

.nav-center a{
    text-decoration: none;
    line-height: 35px;
    margin-left: 20px;
}
.nav-center a:hover{
    color: #f8fffd;
}
.coul-1{
    color: #f8fffd;
}
.coul-2,.coul-3,.coul-4{
    color: #ccd1e9;
}

main{
    width: 100%;
    height: 1900px;
}
main .container{
    display: flex;
    justify-content:space-between;
}
.main-left{
    width: 198px;
    height: 980px;
}
.main-left-top{
    width: 100%;
    height: 293px;
    background-color: #ffffff;
    border: 1px solid #d3e0e9;
    position: relative;
    margin-bottom: 30px;
}
.main-left-top-top img{
    width: 100%;
    height: 149px;
}
.main-left-top-center img{
    width: 100px;
    height: 100px;
    border-radius: 50%;
    position: absolute;
    left: 25%;
    top: 32%;
}
.main-left-top-bottom h4{
    margin-top: 50px;
    text-align: center;
    margin-bottom: 14px;
}
.main-left-top-bottom p{
    text-align: center;
    font-size: 12px;
}
.main-left-center{
    height: 192px;
    width: 100%;
    background-color: #ffffff;
    border: 1px solid #d3e0e9;
    margin-bottom: 22px;
}
.main-left-center h3{
    float: left;
    margin-top: 18px;
    margin-left: 13px;
}
.main-left-center ul{
    margin-left: 15px;
    padding-top: 45px;
}
.main-left-center ul li{
    float: left;
    font-size: 12px;
    list-style: none;
    margin-top: 7px;
}
.main-left-center a{
    text-decoration: none;
    color: #30a4dd;
}
.main-left-bottom{
    width: 100%;
    height: 443px;
    background-color: #ffffff;
    border: 1px solid #d3e0e9;
}
.main-left-bottom h3{
    float: left;
    margin-top: 17px;
    margin-left: 15px;
    margin-right: 90px;
    margin-bottom: 14px;
}
.main-left-bottom img{
    width: 45%;
    height: 118px;
    margin-left: 4px;
}




.main-center{
    width: 418px;
    height: 1847px;
    background-color: saddlebrown;
}
.main-center-top{
    width: 100%;
    height: 858px;
    background-color: #fff;
    border: 1px solid #d3e0e9;
}
.main-center-top h3{
    margin-top: 28px;
    margin-left: 21px;
    margin-bottom: 10px;
}
.main-center-top p{
    margin-left: 21px;
    margin-bottom: 20px;
}
.main-center-top img{
    margin-left: 6px;
    margin-top: 3px;
    width: 47%;
    height: 213px;
}
.main-center-top p{
    margin-top: 20px;
    margin-bottom: 20px;
    font-size: 14px;
    color: #3a576a;
}
.main-center-top span{
    color: #1e3948;
}
.main-center-center{
    width: 100%;
    height: 167px;
    background-color: #fff;
    border: 1px solid #d3e0e9;
}
.main-center-center h4{
    margin-top: 27px;
    margin-left: 18px;
    margin-bottom: 11px;
}
.main-center-center p{
    color: #1e3948;
    font-size: 12px;
    margin-left: 20px;
}
.main-center-bottom{
    width: 100%;
    height: 824px;
    background-color: #fff;
    border: 1px solid #d3e0e9;
}
.main-center-bottom h4{
    margin-top: 28px;
    margin-left: 21px;
    margin-bottom: 10px;
}
.main-center-bottom p{
    margin-left: 21px;
    font-size: 14px;
    color: #1e3948;
    margin-bottom: 25px;
}
.main-center-bottom img{
    width: 100%;
    height: 525px;
    margin-bottom: 20px;
}
.main-center-bottom span{
    color: #1e3948;
    font-size: 14px;
}
.main-center-bottom p{
    font-size: 12px;
    color: #3a576a;
}





.main-right{
    width: 198px;
    height: 755px;
}
.main-right-top{
    width: 100%;
    height: 450px;
    background-color: #fff;
    border: 1px solid #d3e0e9;
    margin-bottom: 30px;
}
.main-right-top h4{
    margin-top: 18px;
    margin-left: 15px;
    margin-bottom: 11px;
}
.main-right-top img{
    width: 100%;
    height: 230px;
    margin-bottom: 16px;
}
.main-right-top h6{
    text-align: center;
    margin-bottom: 5px;
}
.main-right-top p{
    margin-left: 5px;
    font-size: 12px;
    margin-bottom: 15px;
}
.main-right-top a{
    display: inline-block;
    margin-left: 3px;
    text-decoration: none;
    color: #3d93c9;
    padding: 9px 10px;
    border: 1px solid #2a88bd;
    border-radius: 5px;
}
.main-right-center{
    width: 100%;
    height: 210px;
    background-color: #fff;
    border: 1px solid #d3e0e9;
}
.main-right-center h4{
    margin-top: 17px;
    margin-left: 16px;
    margin-bottom: 14px;
}
.main-right-center-top{
    width: 100%;
    height: 70px;
}
.img-1{
    float: left;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin-left: 15px;
    display: flex;
}
.main-right-center p{
    font-size: 12px;
    color: #c5c9ca;
}
.main-right-center span{
    font-size: 12px;
    color: #000023;
    margin-right: 2px;
    margin-left: 10px;
}
.main-right-center .a-1{
    float: left;
    text-decoration: none;
    color: #7babd1;
    padding: 6px 5px;
    border: 1px solid #72b0d3;
    margin-top: 5px;
    margin-left: 9px;
    border-radius: 5px;
}
.main-right-center .img-2{
    float: left;
    margin-left: 15px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
}
.main-right-center .a-2{
    float: left;
    text-decoration: none;
    color: #7babd1;
    padding: 6px 5px;
    border: 1px solid #72b0d3;
    margin-top: 5px;
    margin-left: 9px;
    border-radius: 5px;
}
.main-right-bottom{
    width: 100%;
    height: 48px;
    background-color: #fff;
    border: 1px solid #d3e0e9;
}
.main-right-bottom p{
    margin-top: 10px;
    font-size: 12px;
    text-align: center;
}


footer{
    width: 100%;
    height: 180px;
    border: 1px solid #cccccc;
}
.footer-center{
    width: 450px;
    height: 180px;

    margin: auto;
}
.footer-center p{
    font-size: 12px;
    padding-top: 70px;
}
.footer-center a{
    text-decoration: none;
    color: #369ad3;
}
.footer-center ul{
    margin-top: 15px;
    text-align: center;
}
.footer-center ul a{
    text-align: center;
}

@media (max-width:540px) {
    .container{
        width: 100%;
        flex-wrap: wrap;
    }
    nav a{
        font-size: 14px;
    }
    .main-left{
        margin: auto;
        margin-bottom: 10px;
    }
    .main-center-top img{
        float: left;
    }
    .main-center-top{
        height: 888px;
    }
    .main-right{
        margin: auto;
    }
    .main-right-top{
        margin-top: 40px;
    }
    footer{
        margin-top: 1760px;
    }
    .footer-center{
        text-align: center;
        width: 100%;
    }
}